Problem description

A flaw in the python language was found by the development team. The
SimpleXMLRPCServer library module could permit remote attackers
unintended access to internals of the registered object or it's
module, or possibly even other modules. This only affects python
XML-RPC servers that use the register_instance() method to register an
object without a _dispatch() method. Servers that only use the
register_function() method are not affected.
The updated packages have been patched to prevent these problems.